Twisting tool



Jan. 6, 1925. 1,522,083

A. sTENsRuD TWISTING TOOL Filed Feb, 19, 1923 Patented `lan. 6, 1925.

UNITED STATES ANnR-EW sTENsBUn .or oAkLAivn, .CALIFORNIA 'rwIsTINciy Toor.. i

Application ined February To ZZ 'wlw/)mit may concern- Bev 1t known that I, ANDREW 'S'rENsRUD, a

citizen of the United States," and a resident of Oakland, county of Alameda, State'of California, haveinvented a'new andusefuly Twisting Tool, of which the -followingris a specification. l

The presentinvention relates to improve? ments in twisting tools generally, and has" particular reference to a tool adaptedfto'be of the wrist pin and of the crank shaft be perfectly parallel, andthis condition can be obtainedonly ifl the connecting rod is perfectly straight. however, tliat while the connecting rod is in 'use twists develop in the same which have to be straightened-,outer compensated for by twists of an opposite character in order to secure parallelism of the two axes referred to. My tool is particularlyhdesigned to allow of the twisting or straightening out of the rod to be.performed to a nicety, thereby insuring correct positions of the wrist pin relative' to the crank shaft whereby. best results may be obtained.l

The preferred form of my invention is illustrated in the accompanying drawing in which Figure 1 shows a side view of my twisting tool, the position of the connecting rod being shown in dotted lines, Figure 2 an end view ofthe same, Figures 3 and 4 detail views explaining the working of my tool, Figure 5 a perspective detail view of a reducing member, and Figure 6 a View show- 4 ing the relative position of the wrist pin to the crank shaft when the connecting rod is twisted. While I have shown only the referred form of the invention; it shoul be understood that various changes or modifications may be made within the scope ofthe claims hereto attached without departing from the spirit of the invention. 'It should be particularly understood that while my tool is described in this specification with particular reference to a connecting rod, various other uses may be found for the same'.

My tool consists principally of two gripping members (l) and (2), each of which is provided with an arm (3). The gripping members are formed very much likeA an ordinary hand wrench and comprise a disk prokyond the center.

It frequently happens,

19, 1923. 'seiiainaeaoosa periphery of the disk toa line "(6) `wellbe- Of the two jaws (7) and P.ATiEN OFFlE y j `vided with af recessl'(t) extending :from the l 8)' thus forn'ied', one extends throughout the full dimension ofthe disk while"theiother (8) 1s shortened as shown inthe drawing. The two members are arranged mpparallel.

relation with along jaw of one member opposing a shortj aw of the other'member, and

vice versa,v and 'are held in spaced relation by'means of a spacing member (9)""consistmg'of a sleeve interposed between t-hetwo lmembers, and a spring (11') 'within the sleeve, the ends "(12), of which extend through the two members and are'bent into,4

loops (13) on the outside of the same with 'Cotter pins` (14) pass'ing'fthrough theloops and holding the spring in place'.

y The two arms (3) divergeffrom a center line passing through the center of the recess in opposite direction in the manner s own in Figure 2, but convergev along said central line as shown in Figure 1 so that a shaft (16) disposed transversely to the connecting 4rod to be worked on may pass through the two ends of the two arms. The perforations (17) provided in the ends of the two arms for this purpose are tapered in the manner shown in the drawing so as to allow the two-arms to be moved relative to vone another on the shaft. The latter is provided at` one end with a collar (18) rotatable thereon, having projections' (19) enga-ging registering recesses (21) in one of the arms,

whereby the collar is held `against rotation.

The shaft terminates at this end in the head (22) of square or angular cross section which may be engaged by any suitable wrench Afor imparting rotarymotion to the shaft. The other end of the shaft is engaged .i

by a nut (24) disposed on the outside of the other arm, which nut is held against rotation by a projection (26) extending therefrom engaging a recess (27) in the arm, so that when the shaft (16) is turned lclockwise'the twoyarms of the two wrenches are drawn together. If the shaft is turned counter-clockwise the two arms are separated due to the tension of the spring (29) interposed between the same. Y i

.The manner of using my tool may be described as follows: If the connecting rod (31) is twisted in the manner indicated in Figures 3 and 4, which shows two cross sections through the sainey taken at distant points adapted to be engaged by vthe two Ymembers of my device, the latter are engaged with the connectingrod at'these two points in Ythe manner illustrated vin the said figures, that is the long Jaw engages the side of the connecting rod that has to be twisted back into position, while the short i aw engages the lower edge of the other side. lf now the shaft (1G) turned in a clockwise direction as viewed in Figure 1 a twisting effect will be obtained.whereby thereonnecting rod is straightenedoutr The importance ot this `operation may Abe understood fromthe illustration of F igiire', 6 in which lthe vwrist pin (32) and the cra-iik shaft (S3)v are shown in the @position which they occupy when the connecting rod is twisted. In this 'position the two center lines (34)*and (.36) diverge andmakea proper operation ot the engine inipossibleg After my tool has been used on the connecting rod.

thelatter is returned to la position where itallows the axes of the wrist .pin and the crank shaft tobe parallel.

To allow my deviceto be `used for connecting rods of 'different sizes, I provide a means for changing the size of the recess in the Channel shaped illw v(37) shown in ,line and threaded means engaging the sha tt for forcing thearms together, whereby a twisting action is obtained. c

, 2.111 a twisting device of the character described'a wrench comprising a gripping ,element formed to engage an object on opposite sides for twisting action and a handle joining the said element at an angle to the planel of the object-and atan angle to the ,plane of the grippingelement in combination with a complementary wrench for prorduci'ng twisting action and a spacing inember between the two Wrenches having yielding means associated therewith for forcing the two wrenches upon thcspacing member.

ANDREW STENSRUD. 

